You can still do all that with your Roland you know.

I'm assuming you are using a computer if you post here so you should have a game port on it too, then thats your midi port.

Get an game adapter cable with midi in/out and you're set.

Theres a whole world of software you can get for free off the net and not be limited by the actual Juno sounds and capabilities you might be unhappy with.

Lots of knowledgeable and qualified ppl here. Just ask the right questions and you'll get the right answers.

good luck